"Twice European Champions, the Magpies have fans across the globe."
-- Quidditch Through the Ages (QA7)
Montrose, on the east coast of Scotland, has several sports teams and clubs on its Wikipedia entry, but no Quidditch teams are mentioned (Wikipedia).
Lexicon list of British and Irish League teams
Although the dates printed on the Daily Prophet Newsletters are:
the timeframe for these events is 1992-1993.
From the Web
Writing by J K Rowling on Pottermore:
- The British and Irish Quidditch League
- British and Irish Quidditch teams to support
- Quidditch collection
Harry Potter Wiki: Montrose Magpies